2 * Error resilience / concealment
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * Error resilience / concealment.
32 #include "mpegvideo.h"
34 #include "rectangle.h"
38 * H264 redefines mb_intra so it is not mistakely used (its uninitialized in h264)
39 * but error concealment must support both h264 and h263 thus we must undo this
43 static void decode_mb(MpegEncContext *s, int ref)
45 s->dest[0] = s->current_picture.f.data[0] + (s->mb_y * 16 * s->linesize) + s->mb_x * 16;
46 s->dest[1] = s->current_picture.f.data[1] + (s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize) + s->mb_x * (16 >> s->chroma_x_shift);
47 s->dest[2] = s->current_picture.f.data[2] + (s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize) + s->mb_x * (16 >> s->chroma_x_shift);
49 ff_init_block_index(s);
50 ff_update_block_index(s);
52 if (CONFIG_H264_DECODER && s->codec_id == CODEC_ID_H264) {
53 H264Context *h = (void*)s;
54 h->mb_xy = s->mb_x + s->mb_y * s->mb_stride;
55 memset(h->non_zero_count_cache, 0, sizeof(h->non_zero_count_cache));
57 /* FIXME: It is possible albeit uncommon that slice references
58 * differ between slices. We take the easy approach and ignore
59 * it for now. If this turns out to have any relevance in
60 * practice then correct remapping should be added. */
61 if (ref >= h->ref_count[0])
63 fill_rectangle(&s->current_picture.f.ref_index[0][4 * h->mb_xy],
65 fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
66 fill_rectangle(h->mv_cache[0][scan8[0]], 4, 4, 8,
67 pack16to32(s->mv[0][0][0], s->mv[0][0][1]), 4);
69 ff_h264_hl_decode_mb(h);
72 ff_MPV_decode_mb(s, s->block);
77 * @param stride the number of MVs to get to the next row
78 * @param mv_step the number of MVs per row or column in a macroblock
80 static void set_mv_strides(MpegEncContext *s, int *mv_step, int *stride)
82 if (s->codec_id == CODEC_ID_H264) {
83 H264Context *h = (void*)s;
84 assert(s->quarter_sample);
86 *stride = h->b_stride;
89 *stride = s->b8_stride;
94 * Replace the current MB with a flat dc-only version.
96 static void put_dc(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb,
97 uint8_t *dest_cr, int mb_x, int mb_y)
99 int dc, dcu, dcv, y, i;
100 for (i = 0; i < 4; i++) {
101 dc = s->dc_val[0][mb_x * 2 + (i & 1) + (mb_y * 2 + (i >> 1)) * s->b8_stride];
106 for (y = 0; y < 8; y++) {
108 for (x = 0; x < 8; x++)
109 dest_y[x + (i & 1) * 8 + (y + (i >> 1) * 8) * s->linesize] = dc / 8;
112 dcu = s->dc_val[1][mb_x + mb_y * s->mb_stride];
113 dcv = s->dc_val[2][mb_x + mb_y * s->mb_stride];
122 for (y = 0; y < 8; y++) {
124 for (x = 0; x < 8; x++) {
125 dest_cb[x + y * s->uvlinesize] = dcu / 8;
126 dest_cr[x + y * s->uvlinesize] = dcv / 8;
131 static void filter181(int16_t *data, int width, int height, int stride)
135 /* horizontal filter */
136 for (y = 1; y < height - 1; y++) {
137 int prev_dc = data[0 + y * stride];
139 for (x = 1; x < width - 1; x++) {
142 data[x + y * stride] * 8 -
143 data[x + 1 + y * stride];
144 dc = (dc * 10923 + 32768) >> 16;
145 prev_dc = data[x + y * stride];
146 data[x + y * stride] = dc;
150 /* vertical filter */
151 for (x = 1; x < width - 1; x++) {
152 int prev_dc = data[x];
154 for (y = 1; y < height - 1; y++) {
158 data[x + y * stride] * 8 -
159 data[x + (y + 1) * stride];
160 dc = (dc * 10923 + 32768) >> 16;
161 prev_dc = data[x + y * stride];
162 data[x + y * stride] = dc;
168 * guess the dc of blocks which do not have an undamaged dc
169 * @param w width in 8 pixel blocks
170 * @param h height in 8 pixel blocks
172 static void guess_dc(MpegEncContext *s, int16_t *dc, int w,
173 int h, int stride, int is_luma)
176 int16_t (*col )[4] = av_malloc(stride*h*sizeof( int16_t)*4);
177 uint16_t (*dist)[4] = av_malloc(stride*h*sizeof(uint16_t)*4);
179 for(b_y=0; b_y<h; b_y++){
182 for(b_x=0; b_x<w; b_x++){
183 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
184 int error_j= s->error_status_table[mb_index_j];
185 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
186 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
187 color= dc[b_x + b_y*stride];
190 col [b_x + b_y*stride][1]= color;
191 dist[b_x + b_y*stride][1]= distance >= 0 ? b_x-distance : 9999;
195 for(b_x=w-1; b_x>=0; b_x--){
196 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
197 int error_j= s->error_status_table[mb_index_j];
198 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
199 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
200 color= dc[b_x + b_y*stride];
203 col [b_x + b_y*stride][0]= color;
204 dist[b_x + b_y*stride][0]= distance >= 0 ? distance-b_x : 9999;
207 for(b_x=0; b_x<w; b_x++){
210 for(b_y=0; b_y<h; b_y++){
211 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
212 int error_j= s->error_status_table[mb_index_j];
213 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
214 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
215 color= dc[b_x + b_y*stride];
218 col [b_x + b_y*stride][3]= color;
219 dist[b_x + b_y*stride][3]= distance >= 0 ? b_y-distance : 9999;
223 for(b_y=h-1; b_y>=0; b_y--){
224 int mb_index_j= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_stride;
225 int error_j= s->error_status_table[mb_index_j];
226 int intra_j = IS_INTRA(s->current_picture.f.mb_type[mb_index_j]);
227 if(intra_j==0 || !(error_j&ER_DC_ERROR)){
228 color= dc[b_x + b_y*stride];
231 col [b_x + b_y*stride][2]= color;
232 dist[b_x + b_y*stride][2]= distance >= 0 ? distance-b_y : 9999;
236 for (b_y = 0; b_y < h; b_y++) {
237 for (b_x = 0; b_x < w; b_x++) {
238 int mb_index, error, j;
239 int64_t guess, weight_sum;
240 mb_index = (b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride;
241 error = s->error_status_table[mb_index];
243 if (IS_INTER(s->current_picture.f.mb_type[mb_index]))
245 if (!(error & ER_DC_ERROR))
250 for (j = 0; j < 4; j++) {
251 int64_t weight = 256 * 256 * 256 * 16 / dist[b_x + b_y*stride][j];
252 guess += weight*(int64_t)col[b_x + b_y*stride][j];
253 weight_sum += weight;
255 guess = (guess + weight_sum / 2) / weight_sum;
256 dc[b_x + b_y * stride] = guess;
264 * simple horizontal deblocking filter used for error resilience
265 * @param w width in 8 pixel blocks
266 * @param h height in 8 pixel blocks
268 static void h_block_filter(MpegEncContext *s, uint8_t *dst, int w,
269 int h, int stride, int is_luma)
271 int b_x, b_y, mvx_stride, mvy_stride;
272 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
273 set_mv_strides(s, &mvx_stride, &mvy_stride);
274 mvx_stride >>= is_luma;
275 mvy_stride *= mvx_stride;
277 for (b_y = 0; b_y < h; b_y++) {
278 for (b_x = 0; b_x < w - 1; b_x++) {
280 int left_status = s->error_status_table[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
281 int right_status = s->error_status_table[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride];
282 int left_intra = IS_INTRA(s->current_picture.f.mb_type[( b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
283 int right_intra = IS_INTRA(s->current_picture.f.mb_type[((b_x + 1) >> is_luma) + (b_y >> is_luma) * s->mb_stride]);
284 int left_damage = left_status & ER_MB_ERROR;
285 int right_damage = right_status & ER_MB_ERROR;
286 int offset = b_x * 8 + b_y * stride * 8;
287 int16_t *left_mv = s->current_picture.f.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
288 int16_t *right_mv = s->current_picture.f.motion_val[0][mvy_stride * b_y + mvx_stride * (b_x + 1)];
289 if (!(left_damage || right_damage))
290 continue; // both undamaged
291 if ((!left_intra) && (!right_intra) &&
292 FFABS(left_mv[0] - right_mv[0]) +
293 FFABS(left_mv[1] + right_mv[1]) < 2)
296 for (y = 0; y < 8; y++) {
299 a = dst[offset + 7 + y * stride] - dst[offset + 6 + y * stride];
300 b = dst[offset + 8 + y * stride] - dst[offset + 7 + y * stride];
301 c = dst[offset + 9 + y * stride] - dst[offset + 8 + y * stride];
303 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
311 if (!(left_damage && right_damage))
315 dst[offset + 7 + y * stride] = cm[dst[offset + 7 + y * stride] + ((d * 7) >> 4)];
316 dst[offset + 6 + y * stride] = cm[dst[offset + 6 + y * stride] + ((d * 5) >> 4)];
317 dst[offset + 5 + y * stride] = cm[dst[offset + 5 + y * stride] + ((d * 3) >> 4)];
318 dst[offset + 4 + y * stride] = cm[dst[offset + 4 + y * stride] + ((d * 1) >> 4)];
321 dst[offset + 8 + y * stride] = cm[dst[offset + 8 + y * stride] - ((d * 7) >> 4)];
322 dst[offset + 9 + y * stride] = cm[dst[offset + 9 + y * stride] - ((d * 5) >> 4)];
323 dst[offset + 10+ y * stride] = cm[dst[offset + 10 + y * stride] - ((d * 3) >> 4)];
324 dst[offset + 11+ y * stride] = cm[dst[offset + 11 + y * stride] - ((d * 1) >> 4)];
332 * simple vertical deblocking filter used for error resilience
333 * @param w width in 8 pixel blocks
334 * @param h height in 8 pixel blocks
336 static void v_block_filter(MpegEncContext *s, uint8_t *dst, int w, int h,
337 int stride, int is_luma)
339 int b_x, b_y, mvx_stride, mvy_stride;
340 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
341 set_mv_strides(s, &mvx_stride, &mvy_stride);
342 mvx_stride >>= is_luma;
343 mvy_stride *= mvx_stride;
345 for (b_y = 0; b_y < h - 1; b_y++) {
346 for (b_x = 0; b_x < w; b_x++) {
348 int top_status = s->error_status_table[(b_x >> is_luma) + (b_y >> is_luma) * s->mb_stride];
349 int bottom_status = s->error_status_table[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride];
350 int top_intra = IS_INTRA(s->current_picture.f.mb_type[(b_x >> is_luma) + ( b_y >> is_luma) * s->mb_stride]);
351 int bottom_intra = IS_INTRA(s->current_picture.f.mb_type[(b_x >> is_luma) + ((b_y + 1) >> is_luma) * s->mb_stride]);
352 int top_damage = top_status & ER_MB_ERROR;
353 int bottom_damage = bottom_status & ER_MB_ERROR;
354 int offset = b_x * 8 + b_y * stride * 8;
356 int16_t *top_mv = s->current_picture.f.motion_val[0][mvy_stride * b_y + mvx_stride * b_x];
357 int16_t *bottom_mv = s->current_picture.f.motion_val[0][mvy_stride * (b_y + 1) + mvx_stride * b_x];
359 if (!(top_damage || bottom_damage))
360 continue; // both undamaged
362 if ((!top_intra) && (!bottom_intra) &&
363 FFABS(top_mv[0] - bottom_mv[0]) +
364 FFABS(top_mv[1] + bottom_mv[1]) < 2)
367 for (x = 0; x < 8; x++) {
370 a = dst[offset + x + 7 * stride] - dst[offset + x + 6 * stride];
371 b = dst[offset + x + 8 * stride] - dst[offset + x + 7 * stride];
372 c = dst[offset + x + 9 * stride] - dst[offset + x + 8 * stride];
374 d = FFABS(b) - ((FFABS(a) + FFABS(c) + 1) >> 1);
382 if (!(top_damage && bottom_damage))
386 dst[offset + x + 7 * stride] = cm[dst[offset + x + 7 * stride] + ((d * 7) >> 4)];
387 dst[offset + x + 6 * stride] = cm[dst[offset + x + 6 * stride] + ((d * 5) >> 4)];
388 dst[offset + x + 5 * stride] = cm[dst[offset + x + 5 * stride] + ((d * 3) >> 4)];
389 dst[offset + x + 4 * stride] = cm[dst[offset + x + 4 * stride] + ((d * 1) >> 4)];
392 dst[offset + x + 8 * stride] = cm[dst[offset + x + 8 * stride] - ((d * 7) >> 4)];
393 dst[offset + x + 9 * stride] = cm[dst[offset + x + 9 * stride] - ((d * 5) >> 4)];
394 dst[offset + x + 10 * stride] = cm[dst[offset + x + 10 * stride] - ((d * 3) >> 4)];
395 dst[offset + x + 11 * stride] = cm[dst[offset + x + 11 * stride] - ((d * 1) >> 4)];
402 static void guess_mv(MpegEncContext *s)
404 uint8_t *fixed = av_malloc(s->mb_stride * s->mb_height);
407 #define MV_UNCHANGED 1
408 const int mb_stride = s->mb_stride;
409 const int mb_width = s->mb_width;
410 const int mb_height = s->mb_height;
411 int i, depth, num_avail;
412 int mb_x, mb_y, mot_step, mot_stride;
414 set_mv_strides(s, &mot_step, &mot_stride);
417 for (i = 0; i < s->mb_num; i++) {
418 const int mb_xy = s->mb_index2xy[i];
420 int error = s->error_status_table[mb_xy];
422 if (IS_INTRA(s->current_picture.f.mb_type[mb_xy]))
423 f = MV_FROZEN; // intra // FIXME check
424 if (!(error & ER_MV_ERROR))
425 f = MV_FROZEN; // inter with undamaged MV
430 else if(s->last_picture.f.data[0] && s->last_picture.f.motion_val[0]){
431 const int mb_y= mb_xy / s->mb_stride;
432 const int mb_x= mb_xy % s->mb_stride;
433 const int mot_index= (mb_x + mb_y*mot_stride) * mot_step;
434 s->current_picture.f.motion_val[0][mot_index][0]= s->last_picture.f.motion_val[0][mot_index][0];
435 s->current_picture.f.motion_val[0][mot_index][1]= s->last_picture.f.motion_val[0][mot_index][1];
436 s->current_picture.f.ref_index[0][4*mb_xy] = s->last_picture.f.ref_index[0][4*mb_xy];
440 if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
441 num_avail <= mb_width / 2) {
442 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
445 ff_init_block_index(s);
446 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
447 const int mb_xy = mb_x + mb_y * s->mb_stride;
449 ff_update_block_index(s);
451 if (IS_INTRA(s->current_picture.f.mb_type[mb_xy]))
453 if (!(s->error_status_table[mb_xy] & ER_MV_ERROR))
456 s->mv_dir = s->last_picture.f.data[0] ? MV_DIR_FORWARD
459 s->mv_type = MV_TYPE_16X16;
462 s->dsp.clear_blocks(s->block[0]);
474 for (depth = 0; ; depth++) {
475 int changed, pass, none_left;
479 for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
484 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
487 ff_init_block_index(s);
488 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
489 const int mb_xy = mb_x + mb_y * s->mb_stride;
490 int mv_predictor[8][2] = { { 0 } };
494 int best_score = 256 * 256 * 256 * 64;
496 const int mot_index = (mb_x + mb_y * mot_stride) * mot_step;
497 int prev_x, prev_y, prev_ref;
499 ff_update_block_index(s);
501 if ((mb_x ^ mb_y ^ pass) & 1)
504 if (fixed[mb_xy] == MV_FROZEN)
506 assert(!IS_INTRA(s->current_picture.f.mb_type[mb_xy]));
507 assert(s->last_picture_ptr && s->last_picture_ptr->f.data[0]);
510 if (mb_x > 0 && fixed[mb_xy - 1] == MV_FROZEN)
512 if (mb_x + 1 < mb_width && fixed[mb_xy + 1] == MV_FROZEN)
514 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_FROZEN)
516 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_FROZEN)
522 if (mb_x > 0 && fixed[mb_xy - 1 ] == MV_CHANGED)
524 if (mb_x + 1 < mb_width && fixed[mb_xy + 1 ] == MV_CHANGED)
526 if (mb_y > 0 && fixed[mb_xy - mb_stride] == MV_CHANGED)
528 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride] == MV_CHANGED)
530 if (j == 0 && pass > 1)
535 if (mb_x > 0 && fixed[mb_xy - 1]) {
536 mv_predictor[pred_count][0] =
537 s->current_picture.f.motion_val[0][mot_index - mot_step][0];
538 mv_predictor[pred_count][1] =
539 s->current_picture.f.motion_val[0][mot_index - mot_step][1];
541 s->current_picture.f.ref_index[0][4 * (mb_xy - 1)];
544 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
545 mv_predictor[pred_count][0] =
546 s->current_picture.f.motion_val[0][mot_index + mot_step][0];
547 mv_predictor[pred_count][1] =
548 s->current_picture.f.motion_val[0][mot_index + mot_step][1];
550 s->current_picture.f.ref_index[0][4 * (mb_xy + 1)];
553 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
554 mv_predictor[pred_count][0] =
555 s->current_picture.f.motion_val[0][mot_index - mot_stride * mot_step][0];
556 mv_predictor[pred_count][1] =
557 s->current_picture.f.motion_val[0][mot_index - mot_stride * mot_step][1];
559 s->current_picture.f.ref_index[0][4 * (mb_xy - s->mb_stride)];
562 if (mb_y + 1<mb_height && fixed[mb_xy + mb_stride]) {
563 mv_predictor[pred_count][0] =
564 s->current_picture.f.motion_val[0][mot_index + mot_stride * mot_step][0];
565 mv_predictor[pred_count][1] =
566 s->current_picture.f.motion_val[0][mot_index + mot_stride * mot_step][1];
568 s->current_picture.f.ref_index[0][4 * (mb_xy + s->mb_stride)];
574 if (pred_count > 1) {
575 int sum_x = 0, sum_y = 0, sum_r = 0;
576 int max_x, max_y, min_x, min_y, max_r, min_r;
578 for (j = 0; j < pred_count; j++) {
579 sum_x += mv_predictor[j][0];
580 sum_y += mv_predictor[j][1];
582 if (j && ref[j] != ref[j - 1])
583 goto skip_mean_and_median;
587 mv_predictor[pred_count][0] = sum_x / j;
588 mv_predictor[pred_count][1] = sum_y / j;
589 ref[pred_count] = sum_r / j;
592 if (pred_count >= 3) {
593 min_y = min_x = min_r = 99999;
594 max_y = max_x = max_r = -99999;
596 min_x = min_y = max_x = max_y = min_r = max_r = 0;
598 for (j = 0; j < pred_count; j++) {
599 max_x = FFMAX(max_x, mv_predictor[j][0]);
600 max_y = FFMAX(max_y, mv_predictor[j][1]);
601 max_r = FFMAX(max_r, ref[j]);
602 min_x = FFMIN(min_x, mv_predictor[j][0]);
603 min_y = FFMIN(min_y, mv_predictor[j][1]);
604 min_r = FFMIN(min_r, ref[j]);
606 mv_predictor[pred_count + 1][0] = sum_x - max_x - min_x;
607 mv_predictor[pred_count + 1][1] = sum_y - max_y - min_y;
608 ref[pred_count + 1] = sum_r - max_r - min_r;
610 if (pred_count == 4) {
611 mv_predictor[pred_count + 1][0] /= 2;
612 mv_predictor[pred_count + 1][1] /= 2;
613 ref[pred_count + 1] /= 2;
618 skip_mean_and_median:
622 if (!fixed[mb_xy] && 0) {
623 if (s->avctx->codec_id == CODEC_ID_H264) {
626 ff_thread_await_progress(&s->last_picture_ptr->f,
629 if (!s->last_picture.f.motion_val[0] ||
630 !s->last_picture.f.ref_index[0])
632 prev_x = s->last_picture.f.motion_val[0][mot_index][0];
633 prev_y = s->last_picture.f.motion_val[0][mot_index][1];
634 prev_ref = s->last_picture.f.ref_index[0][4 * mb_xy];
636 prev_x = s->current_picture.f.motion_val[0][mot_index][0];
637 prev_y = s->current_picture.f.motion_val[0][mot_index][1];
638 prev_ref = s->current_picture.f.ref_index[0][4 * mb_xy];
642 mv_predictor[pred_count][0] = prev_x;
643 mv_predictor[pred_count][1] = prev_y;
644 ref[pred_count] = prev_ref;
648 s->mv_dir = MV_DIR_FORWARD;
650 s->mv_type = MV_TYPE_16X16;
653 s->dsp.clear_blocks(s->block[0]);
658 for (j = 0; j < pred_count; j++) {
660 uint8_t *src = s->current_picture.f.data[0] +
661 mb_x * 16 + mb_y * 16 * s->linesize;
663 s->current_picture.f.motion_val[0][mot_index][0] =
664 s->mv[0][0][0] = mv_predictor[j][0];
665 s->current_picture.f.motion_val[0][mot_index][1] =
666 s->mv[0][0][1] = mv_predictor[j][1];
668 // predictor intra or otherwise not available
672 decode_mb(s, ref[j]);
674 if (mb_x > 0 && fixed[mb_xy - 1]) {
676 for (k = 0; k < 16; k++)
677 score += FFABS(src[k * s->linesize - 1] -
678 src[k * s->linesize]);
680 if (mb_x + 1 < mb_width && fixed[mb_xy + 1]) {
682 for (k = 0; k < 16; k++)
683 score += FFABS(src[k * s->linesize + 15] -
684 src[k * s->linesize + 16]);
686 if (mb_y > 0 && fixed[mb_xy - mb_stride]) {
688 for (k = 0; k < 16; k++)
689 score += FFABS(src[k - s->linesize] - src[k]);
691 if (mb_y + 1 < mb_height && fixed[mb_xy + mb_stride]) {
693 for (k = 0; k < 16; k++)
694 score += FFABS(src[k + s->linesize * 15] -
695 src[k + s->linesize * 16]);
698 if (score <= best_score) { // <= will favor the last MV
703 score_sum += best_score;
704 s->mv[0][0][0] = mv_predictor[best_pred][0];
705 s->mv[0][0][1] = mv_predictor[best_pred][1];
707 for (i = 0; i < mot_step; i++)
708 for (j = 0; j < mot_step; j++) {
709 s->current_picture.f.motion_val[0][mot_index + i + j * mot_stride][0] = s->mv[0][0][0];
710 s->current_picture.f.motion_val[0][mot_index + i + j * mot_stride][1] = s->mv[0][0][1];
713 decode_mb(s, ref[best_pred]);
716 if (s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y) {
717 fixed[mb_xy] = MV_CHANGED;
720 fixed[mb_xy] = MV_UNCHANGED;
724 // printf(".%d/%d", changed, score_sum); fflush(stdout);
730 for (i = 0; i < s->mb_num; i++) {
731 int mb_xy = s->mb_index2xy[i];
733 fixed[mb_xy] = MV_FROZEN;
735 // printf(":"); fflush(stdout);
741 static int is_intra_more_likely(MpegEncContext *s)
743 int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
745 if (!s->last_picture_ptr || !s->last_picture_ptr->f.data[0])
746 return 1; // no previous frame available -> use spatial prediction
749 for (i = 0; i < s->mb_num; i++) {
750 const int mb_xy = s->mb_index2xy[i];
751 const int error = s->error_status_table[mb_xy];
752 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
756 if (s->codec_id == CODEC_ID_H264) {
757 H264Context *h = (void*) s;
758 if (h->list_count <= 0 || h->ref_count[0] <= 0 ||
759 !h->ref_list[0][0].f.data[0])
763 if (undamaged_count < 5)
764 return 0; // almost all MBs damaged -> use temporal prediction
766 // prevent dsp.sad() check, that requires access to the image
767 if (CONFIG_MPEG_XVMC_DECODER &&
768 s->avctx->xvmc_acceleration &&
769 s->pict_type == AV_PICTURE_TYPE_I)
772 skip_amount = FFMAX(undamaged_count / 50, 1); // check only up to 50 MBs
776 for (mb_y = 0; mb_y < s->mb_height - 1; mb_y++) {
777 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
779 const int mb_xy = mb_x + mb_y * s->mb_stride;
781 error = s->error_status_table[mb_xy];
782 if ((error & ER_DC_ERROR) && (error & ER_MV_ERROR))
783 continue; // skip damaged
786 // skip a few to speed things up
787 if ((j % skip_amount) != 0)
790 if (s->pict_type == AV_PICTURE_TYPE_I) {
791 uint8_t *mb_ptr = s->current_picture.f.data[0] +
792 mb_x * 16 + mb_y * 16 * s->linesize;
793 uint8_t *last_mb_ptr = s->last_picture.f.data[0] +
794 mb_x * 16 + mb_y * 16 * s->linesize;
796 if (s->avctx->codec_id == CODEC_ID_H264) {
799 ff_thread_await_progress(&s->last_picture_ptr->f,
802 is_intra_likely += s->dsp.sad[0](NULL, last_mb_ptr, mb_ptr , s->linesize, 16);
803 // FIXME need await_progress() here
804 is_intra_likely -= s->dsp.sad[0](NULL, last_mb_ptr, last_mb_ptr+s->linesize*16, s->linesize, 16);
806 if (IS_INTRA(s->current_picture.f.mb_type[mb_xy]))
813 // printf("is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
814 return is_intra_likely > 0;
817 void ff_er_frame_start(MpegEncContext *s)
819 if (!s->err_recognition)
822 memset(s->error_status_table, ER_MB_ERROR | VP_START | ER_MB_END,
823 s->mb_stride * s->mb_height * sizeof(uint8_t));
824 s->error_count = 3 * s->mb_num;
825 s->error_occurred = 0;
830 * @param endx x component of the last macroblock, can be -1
831 * for the last of the previous line
832 * @param status the status at the end (ER_MV_END, ER_AC_ERROR, ...), it is
833 * assumed that no earlier end or error of the same type occurred
835 void ff_er_add_slice(MpegEncContext *s, int startx, int starty,
836 int endx, int endy, int status)
838 const int start_i = av_clip(startx + starty * s->mb_width, 0, s->mb_num - 1);
839 const int end_i = av_clip(endx + endy * s->mb_width, 0, s->mb_num);
840 const int start_xy = s->mb_index2xy[start_i];
841 const int end_xy = s->mb_index2xy[end_i];
844 if (s->avctx->hwaccel)
847 if (start_i > end_i || start_xy > end_xy) {
848 av_log(s->avctx, AV_LOG_ERROR,
849 "internal error, slice end before start\n");
853 if (!s->err_recognition)
857 if (status & (ER_AC_ERROR | ER_AC_END)) {
858 mask &= ~(ER_AC_ERROR | ER_AC_END);
859 s->error_count -= end_i - start_i + 1;
861 if (status & (ER_DC_ERROR | ER_DC_END)) {
862 mask &= ~(ER_DC_ERROR | ER_DC_END);
863 s->error_count -= end_i - start_i + 1;
865 if (status & (ER_MV_ERROR | ER_MV_END)) {
866 mask &= ~(ER_MV_ERROR | ER_MV_END);
867 s->error_count -= end_i - start_i + 1;
870 if (status & ER_MB_ERROR) {
871 s->error_occurred = 1;
872 s->error_count = INT_MAX;
876 memset(&s->error_status_table[start_xy], 0,
877 (end_xy - start_xy) * sizeof(uint8_t));
880 for (i = start_xy; i < end_xy; i++)
881 s->error_status_table[i] &= mask;
884 if (end_i == s->mb_num)
885 s->error_count = INT_MAX;
887 s->error_status_table[end_xy] &= mask;
888 s->error_status_table[end_xy] |= status;
891 s->error_status_table[start_xy] |= VP_START;
893 if (start_xy > 0 && s->avctx->thread_count <= 1 &&
894 s->avctx->skip_top * s->mb_width < start_i) {
895 int prev_status = s->error_status_table[s->mb_index2xy[start_i - 1]];
897 prev_status &= ~ VP_START;
898 if (prev_status != (ER_MV_END | ER_DC_END | ER_AC_END))
899 s->error_count = INT_MAX;
903 void ff_er_frame_end(MpegEncContext *s)
905 int i, mb_x, mb_y, error, error_type, dc_error, mv_error, ac_error;
907 int threshold_part[4] = { 100, 100, 100 };
910 int size = s->b8_stride * 2 * s->mb_height;
911 Picture *pic = s->current_picture_ptr;
913 /* We do not support ER of field pictures yet,
914 * though it should not crash if enabled. */
915 if (!s->err_recognition || s->error_count == 0 || s->avctx->lowres ||
917 s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ||
918 s->picture_structure != PICT_FRAME ||
919 s->error_count == 3 * s->mb_width *
920 (s->avctx->skip_top + s->avctx->skip_bottom)) {
924 if (s->current_picture.f.motion_val[0] == NULL) {
925 av_log(s->avctx, AV_LOG_ERROR, "Warning MVs not available\n");
927 for (i = 0; i < 2; i++) {
928 pic->f.ref_index[i] = av_mallocz(s->mb_stride * s->mb_height * 4 * sizeof(uint8_t));
929 pic->motion_val_base[i] = av_mallocz((size + 4) * 2 * sizeof(uint16_t));
930 pic->f.motion_val[i] = pic->motion_val_base[i] + 4;
932 pic->f.motion_subsample_log2 = 3;
933 s->current_picture = *s->current_picture_ptr;
936 if (s->avctx->debug & FF_DEBUG_ER) {
937 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
938 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
939 int status = s->error_status_table[mb_x + mb_y * s->mb_stride];
941 av_log(s->avctx, AV_LOG_DEBUG, "%2X ", status);
943 av_log(s->avctx, AV_LOG_DEBUG, "\n");
948 /* handle overlapping slices */
949 for (error_type = 1; error_type <= 3; error_type++) {
952 for (i = s->mb_num - 1; i >= 0; i--) {
953 const int mb_xy = s->mb_index2xy[i];
954 int error = s->error_status_table[mb_xy];
956 if (error & (1 << error_type))
958 if (error & (8 << error_type))
962 s->error_status_table[mb_xy] |= 1 << error_type;
964 if (error & VP_START)
970 /* handle slices with partitions of different length */
971 if (s->partitioned_frame) {
974 for (i = s->mb_num - 1; i >= 0; i--) {
975 const int mb_xy = s->mb_index2xy[i];
976 int error = s->error_status_table[mb_xy];
978 if (error & ER_AC_END)
980 if ((error & ER_MV_END) ||
981 (error & ER_DC_END) ||
982 (error & ER_AC_ERROR))
986 s->error_status_table[mb_xy]|= ER_AC_ERROR;
988 if (error & VP_START)
993 /* handle missing slices */
994 if (s->err_recognition & AV_EF_EXPLODE) {
998 for (i = s->mb_num - 2; i >= s->mb_width + 100; i--) {
999 const int mb_xy = s->mb_index2xy[i];
1000 int error1 = s->error_status_table[mb_xy];
1001 int error2 = s->error_status_table[s->mb_index2xy[i + 1]];
1003 if (error1 & VP_START)
1006 if (error2 == (VP_START | ER_MB_ERROR | ER_MB_END) &&
1007 error1 != (VP_START | ER_MB_ERROR | ER_MB_END) &&
1008 ((error1 & ER_AC_END) || (error1 & ER_DC_END) ||
1009 (error1 & ER_MV_END))) {
1015 s->error_status_table[mb_xy] |= ER_MB_ERROR;
1020 /* backward mark errors */
1022 for (error_type = 1; error_type <= 3; error_type++) {
1023 for (i = s->mb_num - 1; i >= 0; i--) {
1024 const int mb_xy = s->mb_index2xy[i];
1025 int error = s->error_status_table[mb_xy];
1027 if (!s->mbskip_table[mb_xy]) // FIXME partition specific
1029 if (error & (1 << error_type))
1032 if (s->partitioned_frame) {
1033 if (distance < threshold_part[error_type - 1])
1034 s->error_status_table[mb_xy] |= 1 << error_type;
1036 if (distance < threshold)
1037 s->error_status_table[mb_xy] |= 1 << error_type;
1040 if (error & VP_START)
1046 /* forward mark errors */
1048 for (i = 0; i < s->mb_num; i++) {
1049 const int mb_xy = s->mb_index2xy[i];
1050 int old_error = s->error_status_table[mb_xy];
1052 if (old_error & VP_START) {
1053 error = old_error & ER_MB_ERROR;
1055 error |= old_error & ER_MB_ERROR;
1056 s->error_status_table[mb_xy] |= error;
1060 /* handle not partitioned case */
1061 if (!s->partitioned_frame) {
1062 for (i = 0; i < s->mb_num; i++) {
1063 const int mb_xy = s->mb_index2xy[i];
1064 error = s->error_status_table[mb_xy];
1065 if (error & ER_MB_ERROR)
1066 error |= ER_MB_ERROR;
1067 s->error_status_table[mb_xy] = error;
1072 dc_error = ac_error = mv_error = 0;
1073 for (i = 0; i < s->mb_num; i++) {
1074 const int mb_xy = s->mb_index2xy[i];
1075 error = s->error_status_table[mb_xy];
1076 if (error & ER_DC_ERROR)
1078 if (error & ER_AC_ERROR)
1080 if (error & ER_MV_ERROR)
1083 av_log(s->avctx, AV_LOG_INFO, "concealing %d DC, %d AC, %d MV errors\n",
1084 dc_error, ac_error, mv_error);
1086 is_intra_likely = is_intra_more_likely(s);
1088 /* set unknown mb-type to most likely */
1089 for (i = 0; i < s->mb_num; i++) {
1090 const int mb_xy = s->mb_index2xy[i];
1091 error = s->error_status_table[mb_xy];
1092 if (!((error & ER_DC_ERROR) && (error & ER_MV_ERROR)))
1095 if (is_intra_likely)
1096 s->current_picture.f.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1098 s->current_picture.f.mb_type[mb_xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1101 // change inter to intra blocks if no reference frames are available
1102 if (!s->last_picture.f.data[0] && !s->next_picture.f.data[0])
1103 for (i = 0; i < s->mb_num; i++) {
1104 const int mb_xy = s->mb_index2xy[i];
1105 if (!IS_INTRA(s->current_picture.f.mb_type[mb_xy]))
1106 s->current_picture.f.mb_type[mb_xy] = MB_TYPE_INTRA4x4;
1109 /* handle inter blocks with damaged AC */
1110 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1113 ff_init_block_index(s);
1114 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1115 const int mb_xy = mb_x + mb_y * s->mb_stride;
1116 const int mb_type = s->current_picture.f.mb_type[mb_xy];
1117 int dir = !s->last_picture.f.data[0];
1119 ff_update_block_index(s);
1121 error = s->error_status_table[mb_xy];
1123 if (IS_INTRA(mb_type))
1125 if (error & ER_MV_ERROR)
1126 continue; // inter with damaged MV
1127 if (!(error & ER_AC_ERROR))
1128 continue; // undamaged inter
1130 s->mv_dir = dir ? MV_DIR_BACKWARD : MV_DIR_FORWARD;
1133 if (IS_8X8(mb_type)) {
1134 int mb_index = mb_x * 2 + mb_y * 2 * s->b8_stride;
1136 s->mv_type = MV_TYPE_8X8;
1137 for (j = 0; j < 4; j++) {
1138 s->mv[0][j][0] = s->current_picture.f.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][0];
1139 s->mv[0][j][1] = s->current_picture.f.motion_val[dir][mb_index + (j & 1) + (j >> 1) * s->b8_stride][1];
1142 s->mv_type = MV_TYPE_16X16;
1143 s->mv[0][0][0] = s->current_picture.f.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][0];
1144 s->mv[0][0][1] = s->current_picture.f.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
1147 s->dsp.clear_blocks(s->block[0]);
1151 decode_mb(s, 0 /* FIXME h264 partitioned slices need this set */);
1156 if (s->pict_type == AV_PICTURE_TYPE_B) {
1157 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1160 ff_init_block_index(s);
1161 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1162 int xy = mb_x * 2 + mb_y * 2 * s->b8_stride;
1163 const int mb_xy = mb_x + mb_y * s->mb_stride;
1164 const int mb_type = s->current_picture.f.mb_type[mb_xy];
1166 ff_update_block_index(s);
1168 error = s->error_status_table[mb_xy];
1170 if (IS_INTRA(mb_type))
1172 if (!(error & ER_MV_ERROR))
1173 continue; // inter with undamaged MV
1174 if (!(error & ER_AC_ERROR))
1175 continue; // undamaged inter
1177 s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
1178 if (!s->last_picture.f.data[0])
1179 s->mv_dir &= ~MV_DIR_FORWARD;
1180 if (!s->next_picture.f.data[0])
1181 s->mv_dir &= ~MV_DIR_BACKWARD;
1183 s->mv_type = MV_TYPE_16X16;
1187 int time_pp = s->pp_time;
1188 int time_pb = s->pb_time;
1190 if (s->avctx->codec_id == CODEC_ID_H264) {
1193 ff_thread_await_progress(&s->next_picture_ptr->f, mb_y, 0);
1195 s->mv[0][0][0] = s->next_picture.f.motion_val[0][xy][0] * time_pb / time_pp;
1196 s->mv[0][0][1] = s->next_picture.f.motion_val[0][xy][1] * time_pb / time_pp;
1197 s->mv[1][0][0] = s->next_picture.f.motion_val[0][xy][0] * (time_pb - time_pp) / time_pp;
1198 s->mv[1][0][1] = s->next_picture.f.motion_val[0][xy][1] * (time_pb - time_pp) / time_pp;
1206 s->dsp.clear_blocks(s->block[0]);
1215 /* the filters below are not XvMC compatible, skip them */
1216 if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration)
1218 /* fill DC for inter blocks */
1219 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1220 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1221 int dc, dcu, dcv, y, n;
1223 uint8_t *dest_y, *dest_cb, *dest_cr;
1224 const int mb_xy = mb_x + mb_y * s->mb_stride;
1225 const int mb_type = s->current_picture.f.mb_type[mb_xy];
1227 error = s->error_status_table[mb_xy];
1229 if (IS_INTRA(mb_type) && s->partitioned_frame)
1231 // if (error & ER_MV_ERROR)
1232 // continue; // inter data damaged FIXME is this good?
1234 dest_y = s->current_picture.f.data[0] + mb_x * 16 + mb_y * 16 * s->linesize;
1235 dest_cb = s->current_picture.f.data[1] + mb_x * 8 + mb_y * 8 * s->uvlinesize;
1236 dest_cr = s->current_picture.f.data[2] + mb_x * 8 + mb_y * 8 * s->uvlinesize;
1238 dc_ptr = &s->dc_val[0][mb_x * 2 + mb_y * 2 * s->b8_stride];
1239 for (n = 0; n < 4; n++) {
1241 for (y = 0; y < 8; y++) {
1243 for (x = 0; x < 8; x++)
1244 dc += dest_y[x + (n & 1) * 8 +
1245 (y + (n >> 1) * 8) * s->linesize];
1247 dc_ptr[(n & 1) + (n >> 1) * s->b8_stride] = (dc + 4) >> 3;
1251 for (y = 0; y < 8; y++) {
1253 for (x = 0; x < 8; x++) {
1254 dcu += dest_cb[x + y * s->uvlinesize];
1255 dcv += dest_cr[x + y * s->uvlinesize];
1258 s->dc_val[1][mb_x + mb_y * s->mb_stride] = (dcu + 4) >> 3;
1259 s->dc_val[2][mb_x + mb_y * s->mb_stride] = (dcv + 4) >> 3;
1263 /* guess DC for damaged blocks */
1264 guess_dc(s, s->dc_val[0], s->mb_width*2, s->mb_height*2, s->b8_stride, 1);
1265 guess_dc(s, s->dc_val[1], s->mb_width , s->mb_height , s->mb_stride, 0);
1266 guess_dc(s, s->dc_val[2], s->mb_width , s->mb_height , s->mb_stride, 0);
1269 /* filter luma DC */
1270 filter181(s->dc_val[0], s->mb_width * 2, s->mb_height * 2, s->b8_stride);
1273 /* render DC only intra */
1274 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
1275 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
1276 uint8_t *dest_y, *dest_cb, *dest_cr;
1277 const int mb_xy = mb_x + mb_y * s->mb_stride;
1278 const int mb_type = s->current_picture.f.mb_type[mb_xy];
1280 error = s->error_status_table[mb_xy];
1282 if (IS_INTER(mb_type))
1284 if (!(error & ER_AC_ERROR))
1285 continue; // undamaged
1287 dest_y = s->current_picture.f.data[0] + mb_x * 16 + mb_y * 16 * s->linesize;
1288 dest_cb = s->current_picture.f.data[1] + mb_x * 8 + mb_y * 8 * s->uvlinesize;
1289 dest_cr = s->current_picture.f.data[2] + mb_x * 8 + mb_y * 8 * s->uvlinesize;
1291 put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
1296 if (s->avctx->error_concealment & FF_EC_DEBLOCK) {
1297 /* filter horizontal block boundaries */
1298 h_block_filter(s, s->current_picture.f.data[0], s->mb_width * 2,
1299 s->mb_height * 2, s->linesize, 1);
1300 h_block_filter(s, s->current_picture.f.data[1], s->mb_width,
1301 s->mb_height , s->uvlinesize, 0);
1302 h_block_filter(s, s->current_picture.f.data[2], s->mb_width,
1303 s->mb_height , s->uvlinesize, 0);
1305 /* filter vertical block boundaries */
1306 v_block_filter(s, s->current_picture.f.data[0], s->mb_width * 2,
1307 s->mb_height * 2, s->linesize, 1);
1308 v_block_filter(s, s->current_picture.f.data[1], s->mb_width,
1309 s->mb_height , s->uvlinesize, 0);
1310 v_block_filter(s, s->current_picture.f.data[2], s->mb_width,
1311 s->mb_height , s->uvlinesize, 0);
1315 /* clean a few tables */
1316 for (i = 0; i < s->mb_num; i++) {
1317 const int mb_xy = s->mb_index2xy[i];
1318 int error = s->error_status_table[mb_xy];
1320 if (s->pict_type != AV_PICTURE_TYPE_B &&
1321 (error & (ER_DC_ERROR | ER_MV_ERROR | ER_AC_ERROR))) {
1322 s->mbskip_table[mb_xy] = 0;
1324 s->mbintra_table[mb_xy] = 1;